SSH EN 61557-7:2007

Siguria elektrike në sistemet shpërndarës me voltazh të ulët deri në 1000 V rrymë alternative dhe 1500 V rrymë të vazhduar — Pajisja për provën, matjen ose monitorimin e masave mbrojtëse — Pjesa 7: Sekuenca fazë

Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence

Scope

This part of IEC 61557 specifies the requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible. This part of IEC 61557 does not apply to ancillary measuring equipment for other quantities, for example voltage testers comprising an additional phase sequence indicator. It does not apply to monitoring relays. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a minor revision.

Related directives

Directives related to this standards.